Page 139 - 2024-bfw-MyersAP4e
P. 139
Module 1.6c
Figure 1.6-19
Decibels 140 Rock band (amplified) Prolonged
at close range exposure The intensity of some
130 above 85 common sounds
decibels One study found 3 million
120 Loud thunder produces
hearing professional musicians had
110 Jet plane at 500 feet loss. almost four times the normal
rate of noise-induced hearing
100 Subway train at 20 feet loss (Schink et al., 2014).
90 Noise-blocking earpieces and
headphones reduce the need
80 Busy street to blast the music at dangerous
corner
70 sebra/Shutterstock volumes.
Distributed by Bedford, Freeman & Worth Publishers. Not for redistribution.
60 Normal
conversation
50
40
Copyright © Bedford, Freeman & Worth Publishers.
30
20 Whisper
10
0 Threshold of hearing
the cochlea’s nerves, convey sound
information to the brain (National Transmitter Figure 1.6-20
Institute on Deafness and Other Com- Hardware for hearing
;
munication Disorders [ NIDCD], 2021 Receiver/stimulator Cochlear implants work by
translating sounds into electrical
Figure 1.6-20 ). When given to deaf signals that are transmitted to the
kittens and human infants, cochlear cochlea and then, via the auditory
implants have seemed to trigger an nerve, relayed to the brain.
“awakening” of the pertinent brain
area (Klinke et al., 1999; Sireteanu, Electrode
1999 ). These devices can help children
become proficient in oral communi-
cation, especially if they receive them
as preschoolers or ideally before age 1
( Dettman et al., 2007 ; Schorr et al.,
2005 ). Hearing, like vision, has a critical
period. Cochlear implants can help
restore hearing for most adults, but
only if their brain learned to process Speech processor
sound during childhood. The restored
hearing can also reduce social iso-
lation and the risk of depression
( Mosnier et al., 2015 ).
Perceiving Loudness, Pitch, and Location
1.6-11 How do we detect loudness, discriminate pitch, and locate sounds?
1.6-11 How do we detect loudness, discriminate pitch, and locate sounds?
We’ve discussed the mechanics of hearing. But how do we experience the variety of
sounds — loud and soft, high and low — that help us navigate our world? And how do we
know where these sounds are coming from?
Sensation: Hearing Module 1.6c 139
03_myersAPpsychology4e_28116_ch01_002_163.indd 139 15/12/23 9:26 AM